Connection closed before full header was received on http post in flutter - flutter

Question

I'm trying to do a http post with the picture the user selects, when trying to make the http call, I get the error 'Connection closed before full header was received', I don't know how to fix it, the same error is happening on a real device.
This is also the documentation for the api, the body is form data.
class UploadVideoServices {
static Future<http.StreamedResponse> postProf({
required String imagePath,
required String title,
required bool isPayPerView,
required bool isDeleted,
required bool show,
required List<String> tags,
required String description,
}) async {
var headers = {'Authorization': 'Bearer ${prefs!.getString('token')}'};
var request = http.MultipartRequest(
'POST',
Uri.parse(
"http url/v1/postpic/634d0ebd2be78793c9474ae0/$title/$description/$show/$isPayPerView/$isDeleted/$tags"));
request.fields.addAll({
'file': imagePath,
});
request.headers.addAll(headers);
http.StreamedResponse response = await request.send();
return response;
}
}
=====
using the services
=====
postProf() async {
try {
var result = await UploadVideoServices.postProf(
imagePath: selectedImagePath.value,
title: 'ajanvideo',
isPayPerView: false,
isDeleted: false,
show: true,
tags: ['ajan', 'app'],
description: 'hey',
);
successSnackBar('Done', 'Posted prof');
return result;
} catch (e) {
errorSnackBar('Opps', e.toString());
print(e.toString());
}
}
======
void getImage(ImageSource imageSource) async {
try {
final pickedFile = await ImagePicker().pickImage(source: imageSource);
if (pickedFile != null) {
selectedImagePath.value = pickedFile.path;
}
print(selectedImagePath.value);
await postProf(); // using the method after getting image
} catch (e) {
errorSnackBar('Opps', 'Failed to get image');
}
}